Back-pedaling coaster-brake.



P.- s. ELLE-infill. BACK PBDALING coAsTEn 1mm. .i

Arrmqnxon rum) JULY s,1so;'

'PatenaJune 15,1909.

FIG .3.

INVENToR: .gi-Mdc UNTTED sT-ATEs PATENT onirica..

' FREDERICK S. ELLETT, OF ELMIRA, NEW YORK, ASSIGNOR TO ECLIPSE MACHINECOMPANY,

OF ELMIR, NEW YORK, A CORPORATION OF NEW YORK.

' BACK-PEDALING COASTER-BRAK.

YNo. 924,973.

Specification of Letters Patent.

Patented .Tune 15, 1909.

To all whom it'mag/ concern:

Be it known that I, Fnnnmucn S. ELLETT, a citizen of the United States,and resident ot' llln'iira` in the county ot Ohcmung and State ot" NewYork. have invented certain new and uset'ul Improvements in Back.Pedaling Coaster-Brakes, ot` which the-following is a speeilieation. 7

This invention relates to back .pedaling coaster brakesA tor veloeipedesand othcr vehicles, and has for its object a simple, strong constructionof tow parts.

In the drawings r-Figure 1 is acentral, longitudinal section of the rearor driving wheel otca bicycle, equipped with the coaster brake; Fig. 2is a side elevation ot thesame, in section to show the parts within;Figs. 3 and l are cross-sections on the lilies 8 3, and l-l,respectively, ot Fig. l; and Fig. 5 is a central, longitudinal sectionot one end ot the driving` wheel, showing a moditica-` tion.

The brake mechanism ot' this application resembles that described inmy'other application Serial No. 436,150. already filed, in

that a stationary, longitudinally split brake shell within the hub isexpanded out against it by a brake actuator that is moved longitudinallyon back pedaling, irst to engage and then to operate the brake. Thebrake mechanism here shown -iditters from that shown in the other saidapplication in that here the brake actuator engages directly with thebrake shell itself, thus dispensing` with the additional part.l employedin the other construction to expand the brake.

The driving mechanism of this application resembles that shown in thepending application of Forsyth and Ellet-t, Serial No. 415,726. Butthere the clutch itselfA acts as a brake on back pedaling, While here itconnects the driver operatively with a separate, nonrotary brakemechanism on back pedaling.

Referring to the drawings, lis the axle, adapted to be locked within therear forks 2, 2 of the bicycle frame by the nut-s 3, 3, respectively.On-one end of the axle there is the usual sprocket 4 that is attached tothe block 5, and supported by ball bearings 6 on the cone 7. At theother end of the axle there is a stationary block 8 that is held againstrotation by suitable means. 'as by the washer 9 with a lug that extendsthrough the bifurcate )forkJ 2 and enters a recess in shell 12issupportedrbythe carrier 13.

said block, as shown by dotted lines in lio' 0 g. s.

lhe hub X is rotatively supported by ball bearings 10 at one end, and 11at the other, upon the sprocket extension 5 and the stationary block 8,respectively. The bugie ametral recesses 14 and 15 in the brake shelland its carrier, respectively, receive the diametral shoulder 1G on thestationary bleek S, so that both brake shell and carrier are heldagainst rotation. and. at the same time. bothA are'movablelongitudinally toward and from the stationary block S.

A wedge 1T on the carrier. and preferably an integral part of it, entersthe longitudinal slot 18 in the brake shell. and engages itsv bevelededge 19. The other end ot' the brake shell is beveled at 20 tocorrespond with a Wedge 21, formed on the end of the diametral shoulder1G. .Accordingly when the sleeve 13 is forced inwardly toward the left'in the drawings, the longitudinally movable brake-actuating wedge 17forees'the brake shell in upon the stationary :utuating-wedge 21, and,since the brake shell is held againstI rotation by both ot' said wedges,it will be expanded out against the hub.

The clutch for forward driving tnlils also the function of transmit-tingfrom the driver l to the lnake-actuating wedge 1T, on back pedaling, alongitudinal thrust to actuate the brake. This clutch consists of anexpansible ring 22, split longitudinally, that is expanded by a lever 23that enters between its separated ends. In the drawings the ring isrepresented as consisting ot' two shoes The shoes and lever aresupported by the sleeve 2st, and the abutment 25vis attached thereto.

' In forward pedaling a shoulder 26 on the driving sprocket-extension 5engages the lever 23 and forces the shoes 22 out radially, so that theyclutch the sprocketto the hub X for driving the wheel.

On back pedaling a cam 2T on the s rocket extension engages acorresponding ace on one of the members of the clutch and forces it inagainst a flange- 28 on the clutch snp- 'porting sleeve, which in turnacts upon the 27a engages the lever 23, which is beveled to meet it,kthe shoes 22 beingl expanded b v the lever as before.

If a retarder is employed, the Sleeve il may be extendedin beneath thebrake supporting` sleeve 13, as represented bj: 2S in Fig. l, and aretarder Q9 attached to the end of it that Will engage the nonrotarvsleeve 13.

A Vhat I Claim is: l. In a. back .pedaling coaster brake, thecombination with a driver, ot' a driven hub; a bra-ke anchor, projectingivitliin thehub and having an inu'ardl)Y directed wedge at 'its innerend; a nonrotarlv, longitudinallv movable, brake-Supporting` sleeve,having a Wedge opposite to and directed toward the said Wedge on theanchor; an expansible. longitudinally movable, brake-ring, split longitudinally to receive Said Wedges, and bev- Jled at its` edges toengage them; and means, operated by the driver on back pedaling, tdaptedto force the brake simpel-ting` sleeve 1nd brake ring longitudinali): toexpantl the latter; Substantially as ehovvn and described.

Q. In a back pedaling coaster brake, the combination ivith a driven hub.of a nonrotary expansible brall; a brake actuator adapted to operateSaid brake buv longituditudinally to engage said brake :ufiuaior arotary driver; and means upon the driver adapted, reapectiveijv, toengage said clutch on for vard pedaling to operate it, and to force Saidclutch longitudinally against said actuator' on back pedaling;eubstantialljY aS shoivn and described.

In a back pedaling coaster brake, the combination ivitli a driven hub,of a nonioi'arjv expansible brake; a brake actuator' adapted to operatesaid brake b v longitudinal movement; an expansible clutch, com prisin`a ring fsplit longitutliinillrv and u lever betiv len the separated endsof the ring: and a driver, having a shoulder projectingl within the hub,adapted to engage the lever to operate it on forward. pedaling, and alsohaving-a' a cam projecting Within the hub and adapted on back pedalingto engage one of the members of the clutch to move it lorgi` tudinallyinto engagement with the brake actuan-nr to operate the brake;subzrantiallv as; Shown and deeeribed.

FRlCDliI-HGK Witnesses z DAvin L. WHi'r'rinn. RALPH D. N1-:narnia

